I completed a drawing in 1:1 scale I need it in 1/8":1' scale. how do I change it without having to redraw. Also how do I get my drawing from model space to paper space? Im trying to learn through an online course but could use a little extra help. thanks

Hello tinmidl, you have done your drawing at scale 1/1 and it's OK.
If you want to print it directly from model space it's possible :
Make or use a format of your choise, for example 8.5x11 and scale it with exact values, for example x8 or x5 or x10 etc... to make your drawing going into it.
Now you have your drawing printable with an exact scale if you launch a print of your format.  
Maybe you will have the set the scale of your lines with LTSCALE if you want to see correctly you dotted and centerlines ( it's depending on what line type you are using).
 
If you want to print it from the paper space, then you will have to insert or make a format and then open a viewport ( or different ports ), set the zoom of the port after openning it with a double clic for example ( Zoom, 1/8xp, enter, lock the viewport with the properties palette ( Ctrl+1 ).
 
Please let us know if this helped and how you have suceeded to print your drawing.
Ask for more.

In my opinion although you could plot your drawing "to scale" from model space you would have to determine through trial and error what scale would be best to use based upon the paper size you will be printing to.  Let's assume for one minute your building would fit on a 24"x36" sheet.  You would go to Plot Scale > Scale in the Plot dialog window and using the drop down list pick 1/8"=1'-0".  You do not have to scale your model space objects.However, I think the best method would be to print your drawing from a paper space layout.  This would require that you create at least one viewport and assign a scale to it which in this case would be 1/8"=1'-0".  Once again you do NOT scale any of your model space objects!  When you plot from a layout the scale is 1:1.  AutoCAD will handle plotting the model space objects all on its own.Layouts are generally used for your title block and border along with any notes.  Furthermore, there is absolutely no reason to be using the old school method of manually assigning a viewport scale using the nXP scale factor method.  Viewport scales can be assigned quite easily using other, more direct, methods.  For instance, you could pick the scale off the viewport toolbar or via your Properties palette or the Quick Properties window.  There is even a scale feature at the bottom of your screen on the Task Bar that is available once the viewport itself is highlighted.  Since you are using AutoCAD 2013 and not AutoCAD 2000 it is time you learned the more direct method of setting a viewport scale.How much do you know about layouts and viewports anyway?Now, where will you be placing your dimensions and text?

John Connor2013-03-19 13:35:01

Everything you need to know about viewports can be found here...http://www.cadtutor.net/forum/showthread.php?72972-Things-you-should-know-about-Viewports.&highlight=display+locked

Options for setting viewport scale can be found here:http://www.cadtutor.net/forum/showthread.php?72213-Viewports-and-Setting-Scale&highlight=viewports